How to Auto-Reset Mobile Data via USSD > 자유게시판

Using USSD to automate SIM card data resets can be a powerful way to optimize data allowances without requiring direct device interaction. Unstructured Supplementary Service Data is a session-based protocol used by GSM networks to communicate with service providers. Unlike web portals, USSD functions over voice channels, making it ideal for low-signal zones.

Various telecom operators offer dedicated dial strings to reset or refresh data allowances. These codes vary by carrier but often start with asterisks. Automating this process involves setting up a platform that initiates resets under predefined conditions, such as on a recurring schedule.

One effective approach is to use a 3G connected to a embedded system like a Arduino. The modem can be controlled via AT commands over a RS-232 interface. By writing a Bash automation script, you can issue the CUSD command. For example, sending AT+CUSD=1,"123#",15 will initiate the USSD request. The modem will then return the carrier’s response, which can be checked for success keywords to detect errors.

Using systemd timers enables fully hands-off operation. For instance, a user might trigger a reset weekly on weekends to avoid peak-hour throttling. The system can also fetch usage stats before resetting and skip reset if under limit, ensuring efficient plan usage.

It’s critical to note that not all carriers support data resets via USSD. Others demand HackMD using a mobile app. Always check official documentation that the specific dial string is recognized by the network. Also, frequent resets may trigger account penalties, so read the fine print before deployment.

Preventing breaches matters. If the automation device is network-connected, ensure it is properly secured. Do not use default logins on the device. The controller should have minimal internet exposure to reduce attack surface.

It’s ideal for businesses managing large-scale remote sensors, remote monitoring systems, or any scenario requiring zero-touch management. It also benefits users with limited plans to avoid overage fees without manual effort.

Automation saves time, it is not a replacement for knowing your carrier’s rules. Regularly review your bills to ensure automation works correctly. Always test with a single SIM before deploying across a fleet.

Ultimately, automating data resets on SIM cards with USSD is a viable solution for anyone needing to avoid exceedance penalties. With the suitable modem, a well-written script, and carrier support, it can become a hands-off method to optimize costs without overspending.